摘要
在单排配筋混凝土低矮剪力墙的墙体或底部配置斜筋,可限制墙体斜裂缝开展,提高剪力墙的基底抗剪切滑移能力,改善其抗震性能。为了解不同斜筋布置形式对其动力性能与地震损伤破坏机理的影响,进行了3个不同配筋形式的混凝土低矮剪力墙模型振动台试验,包括1个普通单排配筋混凝土剪力墙,1个墙体内配置45°斜筋的单排配筋混凝土剪力墙,1个墙体底部配置45°斜筋的单排配筋混凝土剪力墙。在试验基础上,分析了3个剪力墙模型在弹性、开裂及弹塑性损伤破坏等不同受力阶段的自振特性与地震反应,比较了其破坏形态和加速度、位移时程反应。研究结果表明,配置斜筋能有效地提高单排配筋混凝土低矮剪力墙的抗震能力。
For the low-rise concrete shear wall with single layer of web reinforcement, the configuration of the inclined steel bars in the web or at the bottom of wall can limit horizontal shear slip at the bottom construction joints and development of diagonal cracks on the wall,resulting in the seismic performance of wall improved. In order to investigate the influence of different arrangement of inclined steel bars on the dynamic performance and seismic damage mechanism of wall, three shaking table tests of low-rise concrete shear wall models with different reinforcement arrangements were carried out, including a wall only with single layer web reinforcement,a wall with single layer of web reinforcement and 45° inclined steel bars in the web, and a wall with single layer of web reinforcement and 45° inclined steel bars at the bottom. Based the test, the dynamic characteristics,dynamic response and failure mode of each model under elastic and elastic-plastic deformation stages were compared and analyzed. The results show that the configuration of inclined steel bars can effectively improve the seismic capacity of low-rise concrete shear wall with single layer of webreinforcement.
作者
张建伟
郑文彬
曹万林
董宏英
Zhang Jianwei;Zheng Wenbin;Cao Wanlin;Dong Hongying(Key Laboratory of Urban and Engineering Security Disaster of the Ministry of Education,Beijing University of Technology,Beijing 100124,China)
出处
《土木工程学报》
EI
CSCD
北大核心
2018年第A01期65-71,共7页
China Civil Engineering Journal
基金
国家自然科学基金(51378029)
北京市教委科技重点项目(KZ201710005003)
关键词
斜筋
单排配筋低矮剪力墙
动力性能
振动台试验
抗震破坏机理
inclined steel bars
low-rise concrete shear wall with single layer of web reinforcement
dynamic performance
shaking table test
seismic damage mechanism
